A vagina's pH level helps keep it slightly acidic and healthy. The normal flora or healthy bacteria in the vagina thrive when the pH level is balanced. These harmless bacteria, along with vaginal discharge, keep the vagina clean and infection-free. This article explores the definition of pH levels, the normal pH of the vagina, and how it relates to normal flora. It also discusses symptoms of an unbalanced pH as well as home remedies to help keep levels balanced. If you suspect it's unbalanced, easy-to-use at-home tests are available. Normal pH Level pH stands for potential hydrogen. pH levels are based on a scale of 0 to 14 and measure acidity or alkalinity . Numbers lower than 7 are acidic, while higher numbers are alkaline (basic). pH scale The pH scale ranges from 0 (acidic) to 14 (basic): Less than 7 = acidic 7 = neutral Greater than 7 = basic pH levels vary throughout the body. The vagina's pH is natu...